[Beowulf] Thought that this might be of interest

Vincent Diepeveen diep at xs4all.nl
Sun Nov 5 17:37:52 EST 2006


Impressive bandwidth.

Is this the so called 'k8h' revision which has improved SSE2 throughput?

Mind running a prime95 test at 1 core and then at 4 cores, and print the 
iteration time you can get,
like you can find it here?

http://www.mersenne.org/bench.htm

That's the time to do a multiplication and a modulo if i understand well in 
order to try to win
$100k : http://www.eff.org/awards/coop.php

Thanks,
Vincent


----- Original Message ----- 
From: "Joe Landman" <landman at scalableinformatics.com>
To: "beowulf" <beowulf at beowulf.org>
Sent: Sunday, November 05, 2006 2:54 PM
Subject: [Beowulf] Thought that this might be of interest


> We are working on a machine with 2 Opteron 2218s.  For laughs, I ran 
> streams on it.  Here are 1,2,3,4 processor data.
>
> 1 processor:
>
> Copy:       5713.9944      0.0591      0.0560      0.0600
> Scale:      5713.9822      0.0587      0.0560      0.0600
> Add:        5454.2389      0.0911      0.0880      0.0920
> Triad:      5454.1576      0.0916      0.0880      0.0920
>
>
> 2 processors:
>
> Function     Rate (MB/s)  Avg time   Min time  Max time
> Copy:       5713.8788      0.0591      0.0560      0.0640
> Scale:      5713.9822      0.0596      0.0560      0.0640
> Add:        5713.9538      0.0858      0.0840      0.0880
> Triad:      5713.9538      0.0871      0.0840      0.0880
>
>
> 3 processors:
>
> Copy:       8888.4000      0.0391      0.0360      0.0400
> Scale:      8888.4147      0.0391      0.0360      0.0400
> Add:        8570.9733      0.0573      0.0560      0.0600
> Triad:      8570.9551      0.0587      0.0560      0.0600
>
>
> 4 processors:
>
> Copy:      11428.1834      0.0293      0.0280      0.0320
> Scale:     11428.1347      0.0298      0.0280      0.0320
> Add:       10908.5812      0.0449      0.0440      0.0480
> Triad:     10908.6107      0.0440      0.0440      0.0440
>
>
>
> I did get one outlier at 4 CPUs.  Could be a timing glitch.
>
> 4 processors:
> Copy:      13332.7765      0.0302      0.0240      0.0360
> Scale:     13332.7765      0.0262      0.0240      0.0320
> Add:       13332.6220      0.0400      0.0360      0.0480
> Triad:     14999.0756      0.0391      0.0320      0.0480
>
> This is a dual socket 1207 motherboard.  DDR2/533 ECC Registered memory 
> (will look back and check to be sure).
>
> Initial benchmarks (2.6 GHz clock) put it at about 17% faster than Opteron 
> 275 and Woodcrest 5150 (2.66 GHz) on a GAMESS test we use (1h41m for 
> Woodcrest and 275, and 1h26m for this unit).
>
> Joe
>
> -- 
> Joseph Landman, Ph.D
> Founder and CEO
> Scalable Informatics LLC,
> email: landman at scalableinformatics.com
> web  : http://www.scalableinformatics.com
> phone: +1 734 786 8423
> fax  : +1 734 786 8452
> cell : +1 734 612 4615
> _______________________________________________
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